From 459918827ba206c5a83afb767da3027a8cba930a Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Sun, 28 Oct 2012 17:28:55 +0100
Subject: [PATCH] added the template_from_string function

---
 CHANGELOG                                          |    1 +
 doc/functions/index.rst                            |    1 +
 doc/functions/template_from_string.rst             |   27 ++++++++
 lib/Twig/Extension/StringLoader.php                |   64 ++++++++++++++++++++
 .../Fixtures/functions/template_from_string.test   |   11 ++++
 test/Twig/Tests/IntegrationTest.php                |    1 +
 6 files changed, 105 insertions(+), 0 deletions(-)
 create mode 100644 doc/functions/template_from_string.rst
 create mode 100644 lib/Twig/Extension/StringLoader.php
 create mode 100644 test/Twig/Tests/Fixtures/functions/template_from_string.test

diff --git a/CHANGELOG b/CHANGELOG
index 614b362..fa854bf 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 * 1.11.0 (2012-XX-XX)
 
+ * added the template_from_string function
  * optimized the way Twig exceptions are managed (to make them faster)
  * added Twig_ExistsLoaderInterface (implementing this interface in your loader make the chain loader much faster)
 
diff --git a/doc/functions/index.rst b/doc/functions/index.rst
index 3315528..4d9a003 100644
--- a/doc/functions/index.rst
+++ b/doc/functions/index.rst
@@ -13,3 +13,4 @@ Functions
     parent
     dump
     date
+    template_from_string
diff --git a/doc/functions/template_from_string.rst b/doc/functions/template_from_string.rst
new file mode 100644
index 0000000..6936167
--- /dev/null
+++ b/doc/functions/template_from_string.rst
@@ -0,0 +1,27 @@
+``template_from_string``
+========================
+
+.. versionadded:: 1.11
+    The template_from_string function was added in Twig 1.11.
+
+The ``template_from_string`` function loads a template from a string:
+
+.. code-block:: jinja
+
+    {% include template_from_string("Hello {{ name }}") }}
+    {% include template_from_string(page.template) }}
+
+.. note::
+
+    The ``template_from_string`` function is not available by default. You
+    must add the ``Twig_Extension_StringLoader`` extension explicitly when
+    creating your Twig environment::
+
+        $twig = new Twig_Environment(...);
+        $twig->addExtension(new Twig_Extension_StringLoader());
+
+.. note::
+
+    Even if you will probably always use the ``template_from_string`` function
+    with the ``include`` tag, you can use it with any tag or function that
+    takes a template as an argument (like the ``embed`` or ``extends`` tags).
diff --git a/lib/Twig/Extension/StringLoader.php b/lib/Twig/Extension/StringLoader.php
new file mode 100644
index 0000000..90caf28
--- /dev/null
+++ b/lib/Twig/Extension/StringLoader.php
@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_StringLoader extends Twig_Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return array(
+            'template_from_string' => new Twig_Function_Function('twig_template_from_string', array('needs_environment' => true)),
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'string_loader';
+    }
+}
+
+/**
+ * Loads a template from a string.
+ *
+ * <pre>
+ * {% include template_from_string("Hello {{ name }}") }}
+ * </pre>
+ *
+ * @param Twig_Environment $env      A Twig_Environment instance
+ * @param string           $template A template as a string
+ *
+ * @return Twig_Template A Twig_Template instance
+ */
+function twig_template_from_string(Twig_Environment $env, $template)
+{
+    static $loader;
+
+    if (null === $loader) {
+        $loader = new Twig_Loader_String();
+    }
+
+    $current = $env->getLoader();
+    $env->setLoader($loader);
+    try {
+        $template = $env->loadTemplate($template);
+    } catch (Exception $e) {
+        $env->setLoader($current);
+
+        throw $e;
+    }
+    $env->setLoader($current);
+
+    return $template;
+}
diff --git a/test/Twig/Tests/Fixtures/functions/template_from_string.test b/test/Twig/Tests/Fixtures/functions/template_from_string.test
new file mode 100644
index 0000000..41428da
--- /dev/null
+++ b/test/Twig/Tests/Fixtures/functions/template_from_string.test
@@ -0,0 +1,11 @@
+--TEST--
+"template_from_string" function
+--TEMPLATE--
+{% include template_from_string(template) %}
+
+{% include template_from_string("Hello {{ name }}") %}
+--DATA--
+return array('name' => 'Fabien', 'template' => "Hello {{ name }}")
+--EXPECT--
+Hello Fabien
+Hello Fabien
diff --git a/test/Twig/Tests/IntegrationTest.php b/test/Twig/Tests/IntegrationTest.php
index 71cf62d..3b053cd 100644
--- a/test/Twig/Tests/IntegrationTest.php
+++ b/test/Twig/Tests/IntegrationTest.php
@@ -25,6 +25,7 @@ class Twig_Tests_IntegrationTest extends Twig_Test_IntegrationTestCase
         return array(
             new Twig_Extension_Debug(),
             new Twig_Extension_Sandbox($policy, false),
+            new Twig_Extension_StringLoader(),
             new TwigTestExtension(),
         );
     }
-- 
1.7.2.5